Synthesis and crystal structure of a silver(I) 6‐methylmercaptopurine riboside complex.

Silver nitrate reacts with 6‐methylmercaptopurine riboside (6‐MMPR) in aqueous solution containing methanol and dimethyl sulfoxide at room temperature to give a colourless crystalline complex, namely, bis(6‐methylmercaptopurine riboside‐κN7)(nitrato‐κ2O,O′)silver(I) 2.32‐hydrate, [Ag(NO3)(C11H14N4O4S)2]·2.32H2O. The crystal structure, determined from synchrotron diffraction data, shows a central AgI ion on a crystallographic twofold rotation axis, coordinated in an almost linear fashion by two 6‐MMPR ligands via atom N7 (purine numbering), with the nitrate counter‐ion loosely coordinated as a bidentate ligand, forming a discrete molecular complex as an approximate dihydrate. The complex and water molecules are connected in a three‐dimensional network by hydrogen bonding. [ABSTRACT FROM AUTHOR]